<template>
    <div>
        <!-- 导航 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片列表 -->
        <el-card>
            <!-- 警告 -->
            <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
            <!-- 步骤条 -->
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <!-- tab栏区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClick">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price" >
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类">
                            <el-cascader expand-trigger="hover" v-model="addForm.goods_cat" :options="cateList" :props="cateProps" @change="handleChange"></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <!-- 渲染item -->
                        <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                            <!-- 复选框 -->
                            <el-checkbox-group v-model="item.attr_vals"> 
                                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <!-- 图片上传 -->
                        <el-upload action="http://127.0.0.1:8888/api/private/v1/upload" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="handleSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <!-- 富文本编辑器 -->
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>
        <!-- 图片预览对话框 -->
        <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
            <img :src="previewPath" alt="23" class="previewImg">
        </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'

export default ({
    data() {
        return {
            activeIndex:0,
            // 添加商品的表单数据对象
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                goods_cat:[],
                pics:[],
                goods_introduce:'',
                attrs:[]
        },
            // 添加商品的表单数据对象验证规则
            addFormRules:{
                goods_name:[
                    {required:true,message:'请输入商品名称',trigger:'blur'}
                ],
                goods_price:[
                    {required:true,message:'请输入商品价格',trigger:'blur'}
                ],
                goods_weight:[
                    {required:true,message:'请输入商品重量',trigger:'blur'}
                ],
                goods_number:[
                    {required:true,message:'请输入商品数量',trigger:'blur'}
                ],
                goods_cat:[
                    {required:true,message:'请选择商品分类',trigger:'blur'}
                ]
            },
            cateList:[],
            cateProps:{
                label:'cat_name',
                value:'cat_id',
                children:'children'
            },
            // 动态参数获取
            manyTableData:[],
            // 动态属性获取
            onlyTableData:[],
            headerObj:{
                Authorization:window.sessionStorage.getItem('token')
            },
            previewPath:'',
            previewVisible:false
        }
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length===3){
                return this.addForm.goods_cat[2]
            }
            return null
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
       async getCateList(){
        const {data:res} = await this.$http.get('categories')
        if(res.meta.status!==200){
            return this.$message.error('获取数据失败')
        }
        this.cateList=res.data
        console.log(this.cateList);
        },
        // 级联选择器变化
        handleChange(){
           if(this.addForm.goods_cat.length!==3){
               this.addForm.goods_cat=[]
           }
        },
        beforeTabLeave(activeName,beforeAcitveName){
            if(beforeAcitveName==='0'&&this.addForm.goods_cat.length!==3){
                this.$message.error('请先选择商品分类')
                return false
            }
        },
       async tabClick(){
            if(this.activeIndex==='1'){
            const {data:res} =  await this.$http.get(`categories/${this.cateId}/attributes`,{
                params:{sel:'many'}
            })
            console.log(res.data);
            res.data.forEach(item => {
              item.attr_vals= item.attr_vals.length===0?[]:item.attr_vals.split(' ')
            });
            if(res.meta.status!==200){
                return this.$message.error('获取参数列表失败')
            }
           this.manyTableData=res.data
            }else if(this.activeIndex==='2'){
                 const {data:res} =  await this.$http.get(`categories/${this.cateId}/attributes`,{
                params:{sel:'only'}
            })
            console.log(res.data);
            if(res.meta.status!==200){
                return this.$message.error('获取属性列表失败')
            }
           this.onlyTableData=res.data   
            }
        },
        // 图片预览
        handlePreview(file){
            console.log(file)
          this.previewPath=file.response.data.url 
          this.previewVisible=true 
        },
        // 移除图片
        handleRemove(file){
            console.log(file);
            const filePath=file.response.data.tmp_path
           const i= this.addForm.pics.findIndex(x => x.pic===filePath)
            this.addForm.pics.splice(i,1)
            console.log(this.addForm);
        },
        // 上传图片
        handleSuccess(response){
            const picInfo ={
               pic:response.data.tmp_path
            }
            this.addForm.pics.push(picInfo)
            console.log(this.addForm);
        },
        // 添加商品
       add(){
            this.$refs.addFormRef.validate(async valid => {
                if(!valid){
                    return this.$message.error('请填写必要的表单项')
                }
                const form= _.cloneDeep(this.addForm)
                form.goods_cat=form.goods_cat.join(',')
                this.manyTableData.forEach(item => {
                    const newInfo ={attr_id:item.attr_id,attr_value:item.attr_vals.join(' ')}
                    this.addForm.attrs.push(newInfo)
                })
                this.onlyTableData.forEach(item => {
                     const newInfo ={attr_id:item.attr_id,attr_value:item.attr_vals}
                     this.addForm.attrs.push(newInfo)
                 })
                 form.attrs=this.addForm.attrs
                 console.log(form)

                 const {data:res} = await this.$http.post('goods', form)
                 if(res.meta.status!==201){
                     return this.$message.error('添加商品失败')
                 }
                 this.$message.success('添加商品成功')
                 this.$router.push('/goods')
            })
        }

    }
})
</script>

<style lang="less" scoped>
.el-checkbox{
    margin: 0 10px 0 0 !important;
}
.previewImg{
    width: 100%;
}
.btnAdd{
    margin-top: 15px;
}
</style>